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| Section | Objectives |
|---|---|
| Addressing Risk with Selected Security Counter Measures | - Virtual Private Networks (VPNs) - Patch management - Firewalls and network security devices - Anti-virus and endpoint protection |
| Addressing Risk with Security Policy, Organization, and Awareness | - Security awareness and training - Organizational security roles and responsibilities - Security policies and procedures |
| Risk Analysis | - Risk management fundamentals - Cybersecurity risk assessment concepts - Risk and vulnerability analysis techniques |
| How Cyberattacks Happen | - Case studies of industrial cyber incidents - Vulnerabilities in industrial systems - Cyber threats and attack vectors |
| Understanding the Current Industrial Security Environment | - Security challenges in OT environments - Current state of industrial control systems security - Convergence of IT and OT |
| Creating A Security Program | - Security management organization - Defining information security policy - Developing a long-term security program |
| Validating or Verifying the Security of Systems | - Continuous improvement of security measures - Security validation and verification techniques - Auditing and compliance |
| Monitoring and Improving the CSMS | - Security lifecycle management - Continuous monitoring of IACS cybersecurity - Incident detection and response |
| Addressing Risk with Implementation Measures | - Access control principles - Defense-in-depth strategy - Industrial network architecture and segmentation - Zones and conduits model |
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184. Frage
Which is the PRIMARY reason why Modbus over Ethernet is easy to manaqe in a firewall?
Available Choices (select all choices that are correct)
Antwort: D
Begründung:
According to the ISA/IEC 62443-2-4 standard, a training and security awareness program should include all personnel who have access to the industrial automation and control system (IACS) or who are involved in its operation, maintenance, or management. This includes vendors and suppliers, employees, temporary staff, contractors, and visitors. The purpose of the program is to ensure that all personnel are aware of the security risks and policies related to the IACS, and that they have the necessary skills and knowledge to perform their roles in a secure manner. The program should also cover the roles and responsibilities of different personnel, the reportingprocedures for security incidents, and the best practices for security hygiene. References:
* ISA/IEC 62443-2-4:2015 - Security for industrial automation and control systems - Part 2-4: Security program requirements for IACS service providers1
* ISA/IEC 62443 Cybersecurity Fundamentals Specialist Training Course2
185. Frage
Which characteristic is MOST closely associated with the deployment of a demilitarized zone (DMZ)?
Available Choices (select all choices that are correct)
Antwort: D
Begründung:
In cybersecurity, a demilitarized zone (DMZ) refers to a physical or logical subnetwork that contains and exposes an organization's external-facing services to an untrusted network, typically the internet. The main characteristic of a DMZ is that it acts as a buffer zone between the public internet and the private network.
This allows for internet access through the firewall while keeping the internal network secure. Internet-facing servers are placed in the DMZ so that they are separated from the rest of the internal network. By doing so, if a server in the DMZ is compromised, the attacker would not have direct access to the internal network. This architecture is commonly used to host services such as web servers, mail servers, and FTP servers. Choice C is the most closely associated with the deployment of a DMZ as it allows for regulated and monitored internet access through a firewall.
186. Frage
Why is OPC Classic considered firewall unfriendly?
Available Choices (select all choices that are correct)
Antwort: A
Begründung:
OPC Classic uses DCOM, which dynamically assigns any port between 1024 and 65535. Comprehensive Explanation: OPC Classic is a software interface technology that uses the Distributed Component Object Model (DCOM) protocol to facilitate the transfer of data between different industrial control systems. DCOM is a Microsoft technology that allows applications to communicate across a network. However, DCOM is not designed with security in mind, and it poses several challenges for firewall configuration. One of the main challenges is that DCOM does not use fixed TCP port numbers, but rather negotiates new port numbers within the first open connection. This means that intermediary firewalls can only be used with wide-open rules, leaving a large range of ports open for potential attacks. This makes OPC Classic very "firewall unfriendly" and reduces the security and protection they provide. References:
* Tofino Security OPC Foundation White Paper
* Step 2 (for client or server): Configuring firewall settings - GE
* Secure firewall for OPC Classic - Design World
187. Frage
Why is it important for the asset owner to incorporate the IACS into its organization and security program during the Operation and Maintenance phase?
Antwort: D
Begründung:
ISA/IEC 62443 places primary accountability for cybersecurity risk on the asset owner, particularly during the Operation and Maintenance phase of the IACS lifecycle. This phase is where systems run for years or decades, and cybersecurity effectiveness depends less on design intent and more on how people and processes operate daily.
Step 1: Lifecycle responsibility of the asset owner
ISA/IEC 62443-2-1 requires the asset owner to establish, operate, and maintain an IACS Security Program.
During operation, cybersecurity controls must be embedded into routine organizational activities such as operations, maintenance, incident handling, training, and change management.
Step 2: Integration with people and processes
The standard explicitly recognizes that technology alone cannot manage cybersecurity risk. Operators, engineers, maintenance staff, and managers must understand their cybersecurity roles. Embedding IACS security into organizational processes ensures consistent execution across shifts, teams, and sites.
Step 3: Avoiding incorrect interpretations
Immediate decommissioning is not an operational objective. Allowing unrestricted remote updates by suppliers contradicts governance requirements. Granting full control to maintenance providers violates the asset owner's accountability.
Step 4: Operational resilience
By embedding IACS security into organizational culture and workflows, the asset owner ensures that security measures are sustained, monitored, and improved over time.
Therefore, the correct reason is to embed the IACS within organizational processes and people.
188. Frage
Which service does an Intrusion Detection System (IDS) provide?
Available Choices (select all choices that are correct)
Antwort: C
Begründung:
An intrusion detection system (IDS) is a network security tool that monitors network traffic and devices for known malicious activity, suspicious activity or security policy violations. The IDS sends alerts to IT and security teams when it detects any security risks and threats. However, an IDS does not block or prevent the malicious activity, it only detects and reports it. Therefore, an IDS is not the lock on the door for networks and computer systems, nor is it effective against all vulnerabilities in networks and computer systems. An IDS can be combined with an intrusion prevention system (IPS) to block the malicious activity in real time.
References:
* What is Intrusion Detection Systems (IDS)? How does it Work? | Fortinet1
* Intrusion Detection System (IDS) - GeeksforGeeks2
* What is an intrusion detection system (IDS)? - IBM3
189. Frage
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